Great Software For 2D Visualization of Geometry
Conformal Map Viewer
local copy Complex Function Graph Viewer
MagicTile http://roice3.org/magictile/ Windows Mac OS X Linux
MagicTile by Roice Nelson. This program lets you play Rubik's cube represented by Stereographic Projection.
See also: Stereographic Projection
NonEuclid by Joel Castellanos. It's for drawing hyperbolic geometry.
If you have a question, put $5 at patreon and message me.